In what cases are tasks in goroutines placed in the general execution scheduler queue?

In Go, goroutines are placed in the scheduler's run queue in the following cases:

• When a goroutine is created using go and is ready to run, it is added to the scheduler's queue.
• If a goroutine blocks (for example, on I/O operations, channels, or synchronization) and then unblocks, it is returned to the queue.
• When the current goroutine finishes, the scheduler selects the next one from the queue.

The Go scheduler uses an M:N model, where M is the number of system threads and N is the number of goroutines. Goroutines are numerous and are distributed across threads via queues. The scheduler's queue is a structure that stores goroutines ready for execution.

Example:

func main() {
    go func() {
        fmt.Println("Goroutine started")
    }()
    time.Sleep(time.Second) // Wait for the goroutine to execute
}

Here, after creation, the goroutine is placed in the scheduler's queue for execution.